<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS 6-MOS 9-MOS <FISCAL-YEAR-END> DEC-31-1997 DEC-31-1997 DEC-31-1997 <PERIOD-START> JAN-01-1997 JAN-01-1997 JAN-01-1997 <PERIOD-END> MAR-31-1997 JUN-30-1997 SEP-30-1997 <CASH> 3,936 4,149 4,905 <SECURITIES> 123,051 143,618 163,068 <RECEIVABLES> 40,196 44,365 42,312 <ALLOWANCES> 1,449 1,558 1,374 <INVENTORY> 16,661 14,539 14,410 <CURRENT-ASSETS> 69,412 69,521 75,653 <PP&E> 232,865 235,315 239,707 <DEPRECIATION> 93,969 96,285 98,632 <TOTAL-ASSETS> 395,906 416,087 443,368 <CURRENT-LIABILITIES> 35,830 30,787 37,471 <BONDS> 62,517 62,218 59,914 <PREFERRED-MANDATORY> 0 0 0 <PREFERRED> 0 0 0 <COMMON> 10,669 10,669 10,669 <OTHER-SE> 224,379 242,709 228,654 <TOTAL-LIABILITY-AND-EQUITY> 395,906 416,087 443,368 <SALES> 59,614 126,114 188,922 <TOTAL-REVENUES> 896 127,907 191,695 <CGS> 40,076 81,327 122,483 <TOTAL-COSTS> 40,076 81,327 122,483 <OTHER-EXPENSES> 12,988 26,649 39,505 <LOSS-PROVISION> 286 557 791 <INTEREST-EXPENSE> 1,382 2,790 4,147 <INCOME-PRETAX> 5,778 16,584 24,769 <INCOME-TAX> 1,897 5,668 8,454 <INCOME-CONTINUING> 3,881 10,916 16,315 <DISCONTINUED> 0 0 0 <EXTRAORDINARY> 0 0 0 <CHANGES> 0 0 0 <NET-INCOME> 3,881 10,916 16,315 <EPS-PRIMARY> .45<F1> 1.28<F1> 1.91<F1> <EPS-DILUTED> .45<F1> 1.27<F1> 1.90<F1> <FN> <F1>Per share amounts are restated to reflect 2-for-1 stock split effective March 6, 1998 and adoption of FAS128 effective fourth quarter 1997. </FN>